<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="姓名" id="i1">
<input type="text" placeholder="工资" id="i2">
<input type="text" placeholder="工作" id="i3">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <caption>员工列表</caption>
    <tr>
        <th>姓名</th><th>工资</th><th>工作</th>
    </tr>
</table>
<script>
    let i1 =document.querySelector("#i1");
    let i2 =document.querySelector("#i2");
    let i3 =document.querySelector("#i3");
    function f() {
        let tr =document.createElement("tr");
        let nameTd =document.createElement("td");
        let salTd =document.createElement("td");
        let jobTd =document.createElement("td");
        nameTd.innerText =i1.value;
        salTd.innerText =i2.value;
        jobTd.innerText =i3.value;
        //把三个td装进tr
        tr.append(nameTd,salTd,jobTd);
        //得到table
        let table =document.querySelector("table");
        table.append(tr)
    }
</script>
</body>
</html>